He just closes it normally if he wants to. I know him, he is incredibly slim, even quite a bit slimmer than I was when I weighed 55kg; I think the leg opening on his bespoke suits is 15cm in diameter. Most young Italian men who are extremely slim and get bespoke suits made just for fun, simply get them made as slim as possible, often much slimmer than even very open minded tailors would make an 'extremely slim' suit by default.

However, knowing basic optics like from ca. middle school helps in understanding what is going on. I hope you dont panic passing the apex of a corner, because one of the two similar walls seems to become longer and the other one shorter when moving away laterally from the apex of the corner...

“I have always lived violently, drunk hugely, eaten too much or not at all, slept around the clock or missed two nights of sleeping, worked too hard and too long in glory, or slobbed for a time in utter laziness. I’ve lifted, pulled, chopped, climbed, made love with joy and taken my hangovers as a consequence, not as a punishment.”